* [PATCH][next] i3c/master: Fix uninitialized variable next_addr
@ 2020-11-24 12:35 Colin King
2020-11-24 15:48 ` Nicolas Pitre
0 siblings, 1 reply; 2+ messages in thread
From: Colin King @ 2020-11-24 12:35 UTC (permalink / raw)
To: Boris Brezillon, Nicolas Pitre, linux-i3c; +Cc: kernel-janitors, linux-kernel
From: Colin Ian King <colin.king@canonical.com>
The variable next_addr is not initialized and is being used in a call
to i3c_master_get_free_addr as a starting point to find the next address.
Fix this by initializing next_addr to 0 to avoid an uninitialized garbage
starting address from being used.
Addresses-Coverity: ("Uninitialized scalar variable")
Fixes: 9ad9a52cce28 ("i3c/master: introduce the mipi-i3c-hci driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
drivers/i3c/master/mipi-i3c-hci/cmd_v1.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c b/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
index 6dd234a82892..d97c3175e0e2 100644
--- a/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
+++ b/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
@@ -293,7 +293,7 @@ static int hci_cmd_v1_daa(struct i3c_hci *hci)
{
struct hci_xfer *xfer;
int ret, dat_idx = -1;
- u8 next_addr;
+ u8 next_addr = 0;
u64 pid;
unsigned int dcr, bcr;
DECLARE_COMPLETION_ONSTACK(done);
--
2.29.2
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH][next] i3c/master: Fix uninitialized variable next_addr
2020-11-24 12:35 [PATCH][next] i3c/master: Fix uninitialized variable next_addr Colin King
@ 2020-11-24 15:48 ` Nicolas Pitre
0 siblings, 0 replies; 2+ messages in thread
From: Nicolas Pitre @ 2020-11-24 15:48 UTC (permalink / raw)
To: Colin King; +Cc: linux-i3c, kernel-janitors, linux-kernel, Boris Brezillon
On Tue, 24 Nov 2020, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> The variable next_addr is not initialized and is being used in a call
> to i3c_master_get_free_addr as a starting point to find the next address.
> Fix this by initializing next_addr to 0 to avoid an uninitialized garbage
> starting address from being used.
>
> Addresses-Coverity: ("Uninitialized scalar variable")
> Fixes: 9ad9a52cce28 ("i3c/master: introduce the mipi-i3c-hci driver")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Nicolas Pitre <npitre@baylibre.com>
> ---
> drivers/i3c/master/mipi-i3c-hci/cmd_v1.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c b/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
> index 6dd234a82892..d97c3175e0e2 100644
> --- a/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
> +++ b/drivers/i3c/master/mipi-i3c-hci/cmd_v1.c
> @@ -293,7 +293,7 @@ static int hci_cmd_v1_daa(struct i3c_hci *hci)
> {
> struct hci_xfer *xfer;
> int ret, dat_idx = -1;
> - u8 next_addr;
> + u8 next_addr = 0;
> u64 pid;
> unsigned int dcr, bcr;
> DECLARE_COMPLETION_ONSTACK(done);
> --
> 2.29.2
>
>
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